A250670 - cp's OEIS frontend

A250670 Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	669
2	5154
3	34630
4	210158
5	1185860
6	6325144
7	32230991
8	158164928
9	752162284
10	3484008326
11	15783790118
12	70176461116
13	307081524576
14	1325658002144
15	5657123014959
16	23904700805062
17	100166248075189
18	416720321036830

[669, 5154, 34630, 210158, 1185860, 6325144, 32230991, 158164928, 752162284, 3484008326, 15783790118, 70176461116, 307081524576, 1325658002144, 5657123014959, 23904700805062, 100166248075189, 416720321036830]

cp's OEIS Frontend

A250670 Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values